Is anyone experience "back button focus" issue like this?

Started 4 months ago | Questions thread
Erik Baumgartner Senior Member • Posts: 3,241
Re: Is anyone experience "back button focus" issue like this?

WayneDST wrote:

Recently I update my xt3 to fw4.0. the problem is

When I use AE-L/AF-L button as AF, and hold the button. Then I press the shutter button, the problem is sometimes it will trigger the re-focus action. It is quite annoying and missing focus point if I make a re-composition.

Does anyone experience this kind of issue? Is it a fw problem? Thanks.

If you've decoupled AF from the shutter button, it shouldn't. Are you sure you're not just seeing the lens stop down when you half-press the shutter button? See if it still does anything with the lens wide open or in AF-C (which always operates at shooting aperture).

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